ArchivesWiki
http://archiveswiki.historians.org/index.php/Main_Page
Maintained by the American Historical Association, this wiki features user-generated content about archives around the world.

UK Archives Database: Archives 4 All
http://www.nationalarchives.gov.uk/partnerprojects/a4a/
The Archives 4 All Website features information from archives and community groups around the UK.

A Guide to London Archives
http://www.h-net.org/~grad/fyi/londonarchive.html
Although parts of this guide may be slightly outdated, it remains a useful resource for those venturing into the world of London archives.

A Survival Guide to Archival Research
http://www.historians.org/perspectives/issues/2004/0412/0412arc1.cfm
Useful resource from the American Historical Association.

Taking a Byte out of the Archives: Making Technology Work for You
http://www.historians.org/perspectives/issues/2005/0501/0501arc1.cfm
Thinking about using a digital camera, scanner, or other tools? Check out this article from the American Historical Association.